Conveyer



July 15, 1930. N. D. LEVIN 1,770,650

CONVEYER Original Filed April 1'7, 1925 2 Sheets-Sheet l July 15, 1930. N. D. LEVIN 1,770,650

CONVBYER Original Filed April 17, 1925 2 Sheets-Sheet 2 Q/OW I l Patented July 15, 1930 UNITED STATES PATENT OFFICE NILS D. LEVIN, OF COLUMBUS, OHIO, ASSIGNOR TO THE JEFFREY MANUFACTURING COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

converse Application filed April 17, 1925, Serial No. 2 8,947. Renewed December 6, 1928.

The present invention relates to certain new and useful improvements in conveyers,

and particularly to that class of conveyers wherein loose material is propelled alon a conveyer trough by a series of scraper e ements attached to an endless chain which travels aroundsuitable wheels positioned adjacent the ends of the trough.

In order that the vertical dimensions of such conveyers may be sufiiciently'reduced to permit their convenient operation in the restricted space between the floor and roof of a. coal mine, the conveyer chain is commonly permitted to slide upon the bottom of the conveyer trough beneath and in contact with the mass of moving coal. As heretofore constructed entrained particles of coal are carried by the conveyer chain and pressed upon the driving sprocket wheels forming accretions thereon which increase the effective diameter of the wheels','thereby destroying their pitch relation with the cooperating chain.

It is the especial object of this invention to provide an improved arrangement of parts whereby the formation of such accretions upon the sprocket wheels is effectively prevented.

The means whereby I attain this object are fully set forth in the following specification,

.reference being had to the accompanying drawings, of which Fig. 1 is a plan view of the head, or driving, end of a conveyer of the type to which my invention particularly relates.

Fig. 2 is a side elevation of the devices illustrated in Fig. 1.

' Fig. 3 is a longitudinal sectional view taken along the line III-III of Fig. 1.

Fig. 4 is a plan view similar to Flg. 1, wherein part 0 the conveyer chain 1s broken away to disclose the peculiar construction of the trough adjacent the driving sprocket wheel.

Fig...5.is a transverse vertical sectional view taken along the line.V -V of Fig. 1.

Like numerals refer to similar parts in the several figures.

Scraper conveyers adapted to the trans mission of loose material along the restricted passages of coal mines, and similar installations, are well understood in the art. In the present application I have shown a fragment of a conveyer of the general type described, including the head or driving end of the conveyer. trough, the conveyer chain and flights, and the driving sprocket wheel by which the chain is actuated.

As shown in the drawings, the numeral 1 refers to an endless conveyer chain to which are attached laterally extending scraper elements 2,, for propelling material along the conveyer trough, The chain 1 and scrapers'2 are adapted to slide along the late 3 which constitutes the bottom of t e conveyer trough. Attached in any suitable manner to the lateral edges of the plate 3 are side plates 4 to which are secured the guard angles 5 and flaring side plates 6 which constitute the sides of the conveyer trough.

Secured to the side plates 4 adjacent their forward ends are the journal bearings 7 in which are rotatably mounted the head shaft 8 to which is secured the driving sprocket wheel 9 which engages the conveyer chain 1 to drive it. The head shaft 8 may be rotated in any desired manner to actuate the conveyer chain. For purposes of illustration, I have here shown a sprocket wheel 10 and driving chainll adapted to be connected with any convenient and suitable source of rotative power.

At its forward end the bottom plate 3 is bent around the shaft 8, .as illustrated at 12 in Figs. 2 and 3 by dotted lines. The curved end 12 .of the plate 3 forms acylindrical surface concentric with the shaft 8 over which. the conveyer flights 2 slide bars 14 of the chain 1, and is carried thereb alonglthe plate 3. To prevent this fine coal, whi is carried along by the chain 1 over the plate 8, from being dc rocket wheel 9 where e ressure of the 'n 1 would cause it to a ere to the rim of the wheel 9, forming secretions thereon, which increase its effective diameter and deat)! its pitch relation with the chain, I exten the slot18 rearwardly along the plate 3 a sufiicient' distance to permit the final coal traveling beneath the conveyer chain to be discharged throu h the slot 13 before it reaches the sproc et wheel 9, thereby preu ventingx its contact with and accumulation upon t e rim of said sprocket wheel. As a further precaution against the formation of such secretions, I have chax'nfered the rim of the wheel 9 at 9 between the sprocket teeth so that this rim presents sloping surfaces over which fra also be forced laterally by the pressure of the chain, without adherin to the wheel rim.

Such variations in he structure disclosed as amount to mechanical skill are, of course, to be regarded as within the range of my invention.

I claim 1. In a conveyer of the class described, a as base plate, a transverse shaft at one end thereof, a wheel on said shaft and projecting through a longitudinally extending slot in said base late, said slot being extended a substantia y short distance inwardly from ll said wheel, and an open link draft member engaging said wheel and slidable for a portion of its len travel of said aft member bein coincident with said slot and the width of said slot being less than thatof said draft member.

2. In a conveyor of the class described, a base plate, a transverse shaft at one end thereof, a sprocket wheel on said shaft and projecting t rou h a longitudinally extendslot 1n said ase plate, said slot being extended a substantial short distance inwardly from said sproc et wheel, and a link and pintle chain engaging said sprocket wheel and slidable for a portion of its length on said plate, the line of travel of said chain being coincident with said slot, and the margins of said slot being beneath the links of said chain.

8. In a conveyer of the class described, a base plate, a draft member moving over the top of said base plate in the longitudinal direction of the latter, and a wheel supporting ited upon the a portion of said draft member, the periphery fall through the slot without fouling the ents of coal will slide and h on said plate, the line of.

myhand.

NILS D. LEVIN. 

